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All results from a given calculation for CH2Br (bromomethyl radical)

using model chemistry: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
1 2 no C2V 2A1

Conformer 1 (CS)

Jump to S1C2
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-2601.217879
Energy at 298.15K-2601.221684
HF Energy-2601.217879
Nuclear repulsion energy80.669274
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at mPW1PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3208 3047 4.65      
2 A' 1432 1360 17.92      
3 A' 740 703 18.21      
4 A' 257 244 110.03      
5 A" 3364 3194 0.01      
6 A" 952 904 3.25      

Unscaled Zero Point Vibrational Energy (zpe) 4976.2 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 4725.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at mPW1PW91/3-21G*
ABC
9.22566 0.37783 0.36296

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.000 1.485 0.000
Br2 -0.000 -0.368 0.000
H3 0.000 1.992 0.952
H4 0.000 1.992 -0.952

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85361.07881.0788
Br21.85362.54562.5456
H31.07882.54561.9042
H41.07882.54561.9042

picture of bromomethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 118.048 Br2 C1 H4 118.048
H3 C1 H4 123.905
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.484      
2 Br -0.013      
3 H 0.248      
4 H 0.248      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.902 0.000 0.902
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.903 0.000 0.000
y 0.000 -21.074 0.000
z 0.000 0.000 -23.850
Traceless
 xyz
x -3.441 0.000 0.000
y 0.000 3.802 0.000
z 0.000 0.000 -0.361
Polar
3z2-r2-0.722
x2-y2-4.828
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.938 0.000 0.000
y 0.000 5.115 0.000
z 0.000 0.000 2.778


<r2> (average value of r2) Å2
<r2> 42.483
(<r2>)1/2 6.518

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-2601.217851
Energy at 298.15K 
HF Energy-2601.217851
Nuclear repulsion energy80.652364
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at mPW1PW91/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3207 3046 4.65 98.13 0.12 0.21
2 A1 1431 1359 17.91 3.17 0.61 0.76
3 A1 734 697 18.28 7.16 0.25 0.40
4 B1 258 245 110.05 0.37 0.75 0.86
5 B2 3363 3193 0.01 54.39 0.75 0.86
6 B2 951 903 3.25 4.64 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4972.2 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 4721.6 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at mPW1PW91/3-21G*
ABC
9.22560 0.37765 0.36280

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.486
Br2 0.000 0.000 0.369
H3 0.000 0.952 -1.993
H4 0.000 -0.952 -1.993

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85401.07881.0788
Br21.85402.54592.5459
H31.07882.54591.9042
H41.07882.54591.9042

picture of bromomethyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 118.041 Br2 C1 H4 118.041
H3 C1 H4 123.919
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.484      
2 Br -0.013      
3 H 0.248      
4 H 0.248      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.904 0.904
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.903 0.000 0.000
y 0.000 -23.850 0.000
z 0.000 0.000 -21.072
Traceless
 xyz
x -3.443 0.000 0.000
y 0.000 -0.362 0.000
z 0.000 0.000 3.805
Polar
3z2-r27.609
x2-y2-2.054
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.938 0.000 0.000
y 0.000 2.778 0.000
z 0.000 0.000 5.117


<r2> (average value of r2) Å2
<r2> 42.493
(<r2>)1/2 6.519